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XFX XPS-850W Power Supply Review

Testing (Continued):

Temperature, Noise Levels and Fan Speeds:

I am not going to give a pass or fail in this section, as the ATX12V V2.2 does not really have any references on which to base a decision.

Temperatures are purely for information only, as there are too many variables involved when installed in a case, which, by the way, it wasn't. Ambient temperature, processor cooling efficiency and case cooling fans all play their part on the temperature of the air entering the power supply, and consequently the temperature of the air leaving it. No valid conclusions can be made from this test.

XFX Black Edition 850W

Temperature & Fan Speeds @ 110/230VAC

DC Loading(W)

Temp In (°C)

Temp Out (°C)

Δ Temp (°C)

Fan Speed (RPM)

0

N/A

N/A

N/A

575/569

175/174

20.5/20.9

28.8/27.9

8.3/7.0

587/588

419/420

21.0/20.9

38.4/32.7

17.4/11.8

600/593

830/830

21.8/21.3

44.7/41.7

22.9/20.4

1196/1357

This time around, I have given temperatures and fan speeds at 110VAC/230VAC. Acoustically, the XFX Black Edition 850W power supply remained very quiet, even at full load. The temperature differentials measured across the power supply are rather high, but comparable to other power supplies in this class. The average system with just one high end graphics card will probably put the power supply in the 300~400W region when fully loaded and with a fan speed of only 600 rpm it will be very quiet and noise will not be a problem on the XFX Black Edition 850W.